• REAL TIME C BAND LINK BUDGET MODEL CALCULATION

      Rubio, Pedro; Fernandez, Francisco; Jimenez, Francisco; Airbus D&S (International Foundation for Telemetering, 2016-11)
      The purpose of this paper is to show the integration of the transmission gain values of a telemetry transmission antenna according to its relative position and integrate them in the C band link budget, in order to obtain an accuracy vision of the link. Once our C band link budget was fully performed to model our link and ready to work in real time with several received values (GPS position, roll, pitch and yaw) from the aircraft and other values from the Ground System (azimuth and elevation of the reception telemetry antenna), it was necessary to avoid a constant value of the transmitter antenna and estimate its values with better accuracy depending of the relative beam angles between the transmitter antenna and receiver antenna. Keeping in mind an aircraft is not a static telecommunication system it was necessary to have a real time value of the transmission gain. In this paper, we will show how to perform a real time link budget (C band).
    • A REPLACEMENT OF ETHERNET SWICTH FOR NETWORKED TELEMETRY SYSTEM

      Song, Jian; Zhu, Ximing; Beijing Zoweetech Ltd.; Zhongyuan Electronics Technology Institute (International Foundation for Telemetering, 2016-11)
      Ethernet is a common practice to reconstruct a networked telemetry system. However, Ethernet switch cannot best meet the requirement of data transportation in a telemetry system because of its asynchronous mode and the uncertainty of latency time. In addition, the temporal order of the telemetry data will be disrupted when using an Ethernet switch. A device similar to Ethernet switch is presented in this paper, which can transport data synchronously without losing the original temporal order of the telemetry data. Meantime, a special condition is arranged by the device that the timing signal could be transmit from the device to the receiver in a certain delay time, so a timing mechanism derived from IEEE 1588 PTP protocol could be adopted for high accuracy of timing and synchronous sampling control.
    • ROTARY-WING FLIGHT TESTS TO DETERMINE THE BENEFITS OF FREQUENCY AND SPATIAL DIVERSITY AT THE YUMA PROVING GROUND

      Diehl, Michael; Swain, Jason; Wilcox, Tab; Air Combat Systems Directorate (International Foundation for Telemetering, 2016-11)
      The United States (U.S.) Army Yuma Proving Ground (YPG) conducted a series of rotary-wing flight tests for the sole purpose of checking out Telemetry data link instrumentation. Four flights were conducted at YPG in February 2016 that built upon an earlier test flight conducted in June 2015. The most recent iteration of testing examined the benefits of frequency diversity on aircraft and the spatial diversity of receiving sites using existing hardware at YPG. Quantitative analysis from those flight results will be presented and include discussion on how results will affect future mission operations at YPG.
    • SELECTABLE TELEMETRY MODULE FOR INTERIOR BALLISTICS CHARACTERIZATION

      Granitzki, Richard F.; Sweeney, Patrick J.; Choi, Jin; Hoch, Daniel; Vega, Gilmer; US Army Armament Research Development and Engineering Center (International Foundation for Telemetering, 2016-11)
      The Telemetry Branch within the US Army’s Armament Research, Development and Engineering Center (ARDEC) has developed a miniature telemetry device that supports: live data, on-board recording (OBR), and delay repeat OBR telemetry functions in order to capture valuable interior ballistics sensor measurements of developmental munitions and weapons systems. This paper discusses the measurement capability of the STEEL (Selectable Telemetry Enhanced ELectronics) architecture and its typical integrated characteristics. The STEEL architecture has been demonstrated to reliably perform during live fire 155mm artillery and 120mm mortar testing environments. Results will be presented highlighting the electronics’ performance during these extreme environmental conditions.
    • SIMPLIFYING FLIGHT TEST CONFIGURATION WITH CONSTRAINTS

      Noonan, Patrick J.; Ibaroudene, Hakima; Whittington, Austin J.; Moodie, Myron L.; Southwest Research Institute (International Foundation for Telemetering, 2016-11)
      Configuring flight test systems can be a complex process due to the large number of choices that must be made. Making these choices requires system knowledge to build a working configuration in an efficient and timely manner. Historically, flight test systems have embedded this system knowledge in code. The limitation with these approaches is that any change or addition to the system knowledge is costly due to the significant work required to update and maintain the software. We see the philosophy of constraints as a promising path toward addressing these issues. In the context of flight test configuration, a set of constraints defines the limits of how a system may be configured to perform specific tasks. This paper describes an approach for simplifying configuration by moving the system knowledge out of hardcoded business rules and into a flexible architecture that leverages constraints for validation of system configurations.
    • Software Defined Radio MIMO Telemetry Transmitter

      Kosbar, Kurt; Becker, Brandon; Bennett, Charles; Missouri University of Science and Technology, Department of Electrical and Computer Engineering (International Foundation for Telemetering, 2016-11)
      This paper describes the development of a small, low-cost, and flexible telemetry transmitter that can be used for multiple-input multiple-output (MIMO) communication systems. In the intended application, the transmitter will collect data from sensors on small quad copters or drones, regarding the vehicle’s attitude, location, movement, and other flight data. This will be combined into a single data stream, and base-band modulation applied by a field programmable gate array (FPGA). The FPGA output will control a separate RF modulation board, which will generate a pair of RF signals suitable for use in a 2x2 MIMO system. The original application uses the 902- 928MHz ISM band. The modulation format can be altered by changing the software for the FPGA.
    • SOME INITIAL RESULTS FOR DATA-AIDED EQUALIZER EXPERIMENTS AT EDWARDS AFB

      Rice, Michael; Hogstrom, Christopher; Nash, Christopher; Ravert, Jeffrey; Cole-Rhodes, Arlene; Moazzami, Farzad; Saquib, Mohammad; Afran, Md. Shah; Perrins, Erik; Temple, Kip; et al. (International Foundation for Telemetering, 2016-11)
      This paper describes the results of flight tests designed to compare data-aided equalization to blind, adaptive equalization using SOQPSK-TG in aeronautical telemetry. The flight tests were conducted on 3 June 2016 at the Air Force Flight Test Center, Edwards AFB, at upper L band (1801.5 MHz) and at C band (4711.5 MHz). Five data-aided equalizers were implemented and compared to a commercially available blind equalizer. In addition, all equalized bit streams were compared to an unequalized reference. The results show that the blind equalizer tends to be either really good or really bad. In contrast, the data-aided equalizers tend to exhibit more graceful degradation. Which equalization method is “best” is not clear as of this writing. The answer depends on a number factors that will become clear as more data from the experiments is analyzed.
    • SPARSE CHANNEL ESTIMATION FOR AERONAUTICAL TELEMETRY

      Rice, Michael; Hogstrom, Christopher; Brigham Young University (International Foundation for Telemetering, 2016-11)
      This paper applies a compressed sensing (CS) algorithm to SOQPSK-TG waveform samples to reconstruct a sparse channel. The mean squared error (MSE) is computed between the estimated channel and the true channel. The estimated channel is then used in an equalized system and a bit error rate (BER) curve is calculated. The results are then compared to a Maximum Likelihood (ML) estimator. The CS estimate does not produce significant gains but it doesn’t break anything either.
    • Spectrum Access R&D (SARD) Program: Conformal C-Band/Multi-band Antenna Project

      Kujiraoka, Scott; Fielder, Russell; Apalboym, Maxim (International Foundation for Telemetering, 2016-11)
      The Conformal C-Band/Multi-band Antenna project will support the AWS-3 auction by providing the technology to integrate C-Band or multi-band telemetry(TM) antennas on test articles such as missiles, weapons, or aircraft. These test articles would then provide C-Band or multi-band TM data to ground station receivers that are relocated to the C-Band frequency range through the AWS-3 Spectrum Relocation Fund program. This project would advance the technology of antennas in the C-Band region for test article TM integration. Successful use of C-Band and Multi-Band antennas for aeronautical mobile telemetry (AMT) on test and training ranges is dependent on the advancement of key technologies. This paper will detail the technology areas being matured by this project as well as the capabilities to be demonstrated.
    • Study of Second-Order Memory Based LT Encoders

      Perrins, Erik; Shang, Luyao; University of Kansas, Department of Electrical Engineering & Computer Science (International Foundation for Telemetering, 2016-11)
      LT encoder design has always been a basic and crucial topic ever since the development of fountain codes. The memory based LT encoders (MBLTEs) aim at further improving the code performance by managing the input symbols’ degree distribution after an output symbols’ degree distribution is determined. Previous work has shown that the MBLTE has a faster decoder convergence and a lower bit error rate (BER) than the regular LT encoder with the belief propagation (BP) decoder over binary erasure channels (BECs). However, the study of MBLTEs is limited to first-order MBLTEs, higher-order MBLTEs have not been investigated yet. Therefore, in this paper we study the second-order MBLTE, and propose an algorithm for its realization. Simulation results show that our encoder outperforms the first-order MBLTE in terms of the BER. Our proposed second-order MBLTE performs better either with a short code or with a high erasure probability.
    • SYMBOL SET SELECTION IN GSSK MIMO SYSTEMS WITH CORRELATED ANTENNAS

      Borah, Deva K.; Shrestha, Mandip; New Mexico State University, Klipsch School of Elec. & Comp. Eng. (International Foundation for Telemetering, 2016-11)
      Generalized space shift keying (GSSK) is a transmission scheme where only antenna indices are used to send information from the transmitter to a receiver. This paper investigates the best symbol set selection problem in GSSK multiple-input-multiple-output (MIMO) systems when the transmit antennas are correlated. Although multiple antennas can increase data rate and signal quality without increasing the bandwidth, spatial correlations among the antennas highly affect the performance of the system. The idea here is to maximize the inter-symbol Euclidean distance to obtain the best symbol set. Recently such an algorithm has been proposed for the visible light communication (VLC) systems. This paper adopts this VLC algorithm for radio frequency (RF) communication systems. The results show that the proposed symbol set design can provide several dBs of gain in the symbol error rate (SER) performance over randomly selected symbol sets in GSSK systems.
    • TELEMETRY RECONSTRUCTION AND ANALYSIS USING VIRTUAL REALITY

      Verges, Katherine; Graham, Richard; NSWC Corona Division (International Foundation for Telemetering, 2016-11)
      Currently, telemetry analysis is visually disconnected from the system being analyzed; analysts look at a series of two dimensional functions plotted over time that represent everything that happens. As the digital age continues to evolve and grow, a new technology is emerging in the world of entertainment: Virtual Reality (VR). VR describes a system that uses a headset to create a completely manufactured environment for the user to utilize and explore. This technology can be harnessed in order to translate raw telemetry data into an all-inclusive image of a system being analyzed in a 3-dimensional (3D) format. It would allow an analyst to fully visualize results and better understand what is occurring and has the potential to remove some of the subjectivity that comes with analyzing functions in order to help scientists and engineers to more efficiently improve their products. VR technology could be applied in a variety of fields-- defense, medicine, biology, and many more—and could help pave the way to technical advancements for a better world.
    • TELEMETRY SYSTEM FOR REALTIME MONITORING OF AN OFFROAD RACECAR

      Marcellin, Michael; Boyer, Kyle; Brubaker, Laura; Everly, Kyle; Herriman, RIchard; Sackett, Mark; Tran, Huy; Univ Arizona, Dept Elect & Comp Engn (International Foundation for Telemetering, 2016-11)
      The University of Arizona Baja racing team competes annually in a grueling fourhour offroad endurance race which subjects vehicles to an array of obstacles such as jumps, boulders, and mud bogs. This paper examines the telemetering system created by the UA Baja Team to monitor a range of critical aspects of the car with the goal of detecting and identifying possible mechanical failures and areas with potential for improvement. Running on an Arduino Mega, the system stores all gathered data to an SD card and transmits it back to the pit wirelessly for realtime analysis.
    • TENA – ALLEVIATING MANPOWER AND OPERATIONAL COSTS WITHIN THE TELEMETRY COMMUNITY

      Hudgins, Gene; Poch, Keith; Secondine, Juana; TENA Software Development Activity (SDA) (International Foundation for Telemetering, 2016-11)
    • TOWARDS A NEW TRACKING ARCHITECTURE

      Busson, Francois; Pierozak, Jean-Guy; Richard, Hugues; Kipfer, Gerard; ZODIAC AEROSPACE; ZODIAC DATA SYSTEMS (International Foundation for Telemetering, 2016-11)
      A telemetry facility may connect numerous telemetry receivers to a single tracking antenna depending on the number of TM channels involved in the test and on the required redundancy. The tracking data, i.e. AM normalized analog signals extracted by the receivers from the TM signal and the AGC analog signals, are sent to the Antenna Control Unit (ACU) for tracking error calculation. The number of cables between receivers and ACU becomes important in some telemetry facilities and the tracking signals being analog, the distance must be limited. This paper proposes a new tracking architecture that moves from analog to digital links between receivers and ACU with the following main benefits:  Keeping the capability to acquire tracking data (AM&AGC) from several telemetry receivers,  Having more flexibility for integration,  Improving interoperability,  Providing availability of simultaneous tracking errors for enhanced tracking algorithms, for C-band tracking improvement for example.
    • Towards Real-Time CMA Equalization by using FFT for Signal Blocks transmitted over an Aeronautical channel

      Cole-Rhodes, Arlene; Moazzami, Farzad; Taiwo, Peter; Dossongui, Itie Serge Kone; Morgan State University, Dept Elect and Comp Eng (International Foundation for Telemetering, 2016-11)
      We consider the problem of equalizing data blocks of signals, which have been transmitted over an aeronautical channel using two different modulation schemes. The equalization is performed using the block-processing constant modulus algorithm (CMA), and in order to achieve real-time processing a Fast Fourier Transform (FFT) is used to compute the gradient of this cost function during equalization. The equalizer length is chosen to be five times of the channel length. For the first experiment, we present the result of equalizing a set of measured data, which was modulated and transmitted using the iNET packet structure with SOQPSK modulation. In this case, the CMA equalizer is first initialized using MMSE and the equalizer coefficients are then updated once, using each entire block (iNET packet). In the second experiment, we apply the FFT-based block processing equalizer to received data blocks of QPSK signals, which have been randomly generated and transmitted over an aeronautical channel. A modified constant modulus algorithm and alphabet matched algorithm (CMA + AMA) equalizer is used to recover these data blocks. For this case of QPSK signals, the equalizer performance is evaluated over 500 Monte Carlo runs, using the average symbol error rate (SER).
    • Unsupervised Segmentation and Labeling for Smartphone Acquired Gait Data

      Martinez, Matthew; De Leon, Phillip L.; New Mexico State University, Klipsch School of Elec. & Comp. Eng.; Sandia National Laboratories (International Foundation for Telemetering, 2016-11)
      As the population ages, prediction of falls risk is becoming an increasingly important research area. Due to built-in inertial sensors and ubiquity, smartphones provide an at- tractive data collection and computing platform for falls risk prediction and continuous gait monitoring. One challenge in continuous gait monitoring is that signi cant signal variability exists between individuals with a high falls risk and those with low-risk. This variability increases the di cultly in building a universal system which segments and labels changes in signal state. This paper presents a method which uses unsu- pervised learning techniques to automatically segment a gait signal by computing the dissimilarity between two consecutive windows of data, applying an adaptive threshold algorithm to detect changes in signal state, and using a rule-based gait recognition al- gorithm to label the data. Using inertial data,the segmentation algorithm is compared against manually segmented data and is capable of achieving recognition rates greater than 71.8%.
    • USE OF GIGE VISION ETHERNET CAMERAS FOR FLIGHT TEST APPLICATIONS WITHOUT DATA LOSS

      Holmeide, Ø.; Schmitz, M.; OnTime Networks AS; OnTime Networks LLC (International Foundation for Telemetering, 2016-11)
      As Ethernet based networks have become the dominant choice for Flight Test Instrumentation (FTI) network applications, it is also clear that Ethernet based camera integration and applications have yet to become more wide spread for system level design and integration. A significant customer base utilizes either separate video compression systems or even just stand-a-lone gopro cameras for recording purposes in an unsynchronized ways. The use of uncompressed high definition (HD) video from GigE Vision Ethernet cameras for flight test applications is a significant issue in managing the large volumes of data produced by the cameras and forwarding them to any 1000BASE-T(x) switch port without packet loss and significant delays. Of course an easy approach to overcome this issue would be to just increase the network bandwidth from 1000BASE-T(x) to 10GBASE-SR, but most FTI systems just moved to 1000BASE-T(x) in the past years and therefore changing the overall system hardware is cost prohibited. One concern has been the use of compression algorithms to reduce the required video bandwidth, with the negative side effect that the image quality reduces and end-to-end latency increases, which is not acceptable for some applications. Further, it is important that data from cameras is available to a number of different multicast consumers within the FTI network, for example workstations, recorders and telemetry systems. These video data stream also require synchronization so that they can be analyzed in post processing.
    • WAVEFIELD-BASED MOTION ESTIMATION FOR RADAR AND SONAR ARRAY SYSTEMS

      Lee, Hua; Radzicki, Vincent R.; University of California, Department of Electrical and Computer Engineering (International Foundation for Telemetering, 2016-11)
      This paper introduces a generalized and computationally efficient approach for the estimation of target motion parameters from received wavefield data collected from coherent sensing systems such as radar and sonar measurement arrays. The mathematical content of the algorithm is described, along with the general processing procedure to perform on recorded data. The algorithm presents a solution to the joint estimation of translational motion and periodic motion of targets, which has many practical applications for sensing and detection tasks. Experimental and simulation results are included supporting the effectiveness of the method.
    • WEARABLE WIRELESS BODY AREA NETWORK

      Marcellin, Michael; Melde, Kathleen; Fajardo, Nicolas; Garrick, Kevin; Giroud, Xaviere; Kehn, Brian; Maggio, Andrew; Read, Cecilia; Univ Arizona, Dept Elect & Comp Engn (International Foundation for Telemetering, 2016-11)
      This document will provide a detailed description of the original design behind our device, device casing, and iOS application. It will cover process of assembly, as well as failure analysis and future directions for the project.